64810642 has 16 divisors (see below), whose sum is σ = 109247040. Its totient is φ = 28611792.

The previous prime is 64810631. The next prime is 64810657. The reversal of 64810642 is 24601846.

It is a super-3 number, since 3×64810642³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53592 + ... + 54787.

It is an arithmetic number, because the mean of its divisors is an integer number (6827940).

Almost surely, 2^64810642 is an apocalyptic number.

64810642 is a deficient number, since it is larger than the sum of its proper divisors (44436398).

64810642 is a wasteful number, since it uses less digits than its factorization.

64810642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108417.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 64810642 is about 8050.5056984018. The cubic root of 64810642 is about 401.6817568255.

The spelling of 64810642 in words is "sixty-four million, eight hundred ten thousand, six hundred forty-two".